linux-kernel - Re: [PATCH v2 05/11] firewall: introduce stm32

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Message-ID: <ZMDz1AhlEeZTM/vi@corigine.com>
Date:   Wed, 26 Jul 2023 12:22:12 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     Gatien Chevallier <gatien.chevallier@...s.st.com>
Cc:     Oleksii_Moisieiev@...m.com, gregkh@...uxfoundation.org,
        herbert@...dor.apana.org.au, davem@...emloft.net,
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Subject: Re: [PATCH v2 05/11] firewall: introduce stm32_firewall framework

On Tue, Jul 25, 2023 at 06:40:58PM +0200, Gatien Chevallier wrote:

...

> diff --git a/drivers/bus/stm32_firewall.c b/drivers/bus/stm32_firewall.c

...

> +int stm32_firewall_controller_register(struct stm32_firewall_controller *firewall_controller)
> +{
> +	struct stm32_firewall_controller *ctrl;
> +
> +	pr_info("Registering %s firewall controller\n", firewall_controller->name);
> +
> +	if (!firewall_controller)
> +		return -ENODEV;

HI Gatien,

Sorry, one more on this patch, that I missed before sending my previous
email.

firewall_controller is checked for NULL here.
But it is already dereferenced on the line above the check.

Flagged by Smatch.

...